Experimental study of radial electric field and electrostatic potential fluctuation in the Large Helical Device

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Experimental study of radial electric field and electrostatic potential fluctuation in the Large Helical Device, Ido, T, Shimizu, A, Nishiura, M, Nagaoka, K, Yokoyama, M, Ida, K, Yoshinuma, M, Toi, K, Itoh, K, Nakano, H, Nakamura, S, Watanabe, F, Satake, S, Yoshimura, Y, Osakabe, M, Tanaka, K, Tokuzawa, T, Takeiri, Y, Tsumori, K, Ikeda, K, Kubo, S, Shimozuma, T, Igami, H, Takahashi, H, Tamura, N, LHD Experiment Group